Stone-laying jack



(No Model.)

J. H. LIBBE.

STONE LAYING JACK.

No. 362,982. Patented May 17. 18'87.,q

UNITE iSaintes JOHN HENRY LIBBE, OF TOLEDO, OHIO.

STONE-LAYING JACK.

SPECIFICATION forming part o Letters Patent No. 362,982, dated May 17, 1887.

Application filed June l` |896.

To all whom it may concern:

Be it known that'l, JOI-1N HENRY Linen, a citizen ofthe United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented a new and useful Lifting and Carrying Stone-Laying Jack, of which the following is a specification.

My invent-ion relates to improvements in lifting and carrying stone laying jacks which are more especially adapted-to moving and laying sidewalk-slabs .s ad sing-ilarfstones; and the objects of my inventionlare, iirst, to provide a crane which shall have adjustments well adapted to the purpose, and second, to provide, in combination with said crane, suitable hoisting and holding apparatus, all of which will be hereinafter fully explained, and will be fully illustrated in the accompanying drawings, in which- Figure 1 is a side elevation on line A, Fig. 2. Fig. 2 is an end elevation on lineB, Fig. l. Fig. 3 is an enlarged side View of a lockingbolt, shown at D in Fig. 2. Fig. 4 is an end view of said lockingbolt on line C, Fig. 3. Fig. 5 is an enlarged sectional view of one of the rock-lifting hooks, showing the method of attaching the same to a rock.

Similar letters refer to similar paris throughont the several views.

E is a horizontal bar, to which the legs F are adjustably pivoted at G.

H H are stay-bars, which are adjnstably connected to the legs` F and to the bar E by means ofthe bolts I and l'. y'

On either end of the frame shown in Fig. l av pair of legs, F F, are lockedl together by means of the cross-bars J and J', thus forming a substantial trestle for supporting the top bar, E, and its attachments. It is obvious that these leg-trestles are adapted to be moved toward and from each other upon the pivots G in the direction of the arrows K. At thclowcr extremity of the legsFare jonrnaled the trucks L. These trucks are adapted to roll upon the tracks M and carry the mechanism which they support.

At N and N are powershafts having the cranks P and P. These shafts are journaled in boxes which are attached to one of the end trestles, and are connected by multiplyinggearing Q, and the shaft N carries the wind* ing-drum R.

Serial No. 203,581. (No model.)

At S S S are pulley blocks, each having a suiiicient number of pulleys, so that, in combination with the gearing Q and the power-shafts N and N', the desired power forliftiug can be obtained. ln this case the block S has one pulley, the block S two pulleys, andthe block S has three pulleys; but I do not confine myself to the use of blocks having any definite number of p'ulleys; but the blocks and pulleys named, in combination with the gearing and power-shutting described, are sufficient for any ordinary Work required ot' this machine. The Winding-dru n1 R and the blocks S S S ar'e connected with the chains Z Z by means of a rope or chain in the ordinary manner.

At T T T are three hooks of peculiar coustruction. (Shown in scctionin Fig. 5.) These hooks are for lifting and sul'iporting the rock U, and three are required to balance the rock in a level position. In Fig. 5 the form of these hooks is shown as they appear when cut on line b, Fig. 2. this hook (where the lifting-chain Z attaches) and the lower extremity, \V, (which lies under the rock U,) both lie substantially in the same gravity-line, X, with the exception that the extremity W should project slightly bcyond the said line, as shown in the drawings, the purpose of which is to prevent the said hook from slipping from its hohl.

The locking-bolt shown in Figs. 3 and t is intended to slide in either direction, as indicated bythe double-headed arrowin the drawings, and ils use is to lock or release the crank Y.

The operation of this mechanisln is as follows: The tracks M M having been located a sufficient distance apart to readily admit the breadth of the stone which is to be operated upon, the trestle-legs F F are adj usted to correspond to the said breadth by being swung upon the pivots G, and secured in position by means of the slaybars H H. The hook on the pulley-block S is connected with the hooks T T T by means of ordinary chains, Z, three of said hooks T TT being required to properly balance the rock U, as before mentioned. The rock is now suspended by turningthe crank l) or l in the usual manner, the crank P or the crank P being used, according to the weight of the rock to be suspended. When the said rock has been raisedasufeient height,

The upper extremity, V, of

he end D of the bolt D is passed beyond the evolving plane of the vertical arm of the mank, thus preventing the further revolving f the crank. This is shown in Figs. 2 and 3. 3y this means the rock is held suspended any ength of time, for the purpose of moving the Laid rock any distance over the tracks M M, within the limit of tl1eirlengths,) and then leposited in the desired position in an obvi- )ns manner. To prevent the winding appaatus being tampered with when not in use, ahe bolt D maybe placedin theposition shown n Fig. 3, and by means of any suitable lock :ecured to the crank P or P.

Having described my invention, I do not zlaim, broadly, a liftingjack of any of' the 'or`ms in general nse;.but

What I do claim as new, and desire to se- :u re by Letters Patent, is-

1. Astone-laying jack comprising the bar E, he trestled legs FF, thetrucks L, the connect l ng cross-bars J and J, the stay-bars H H, and he bolts I I', the said legs F F being pivot- .lly attached to the sides of the bar E and adaptedto be swung upon their pivots and to be secured in fixed position by means of the said stay-bars H H and bolts I I and I( I', said jack being adapted to be rolled upon tracks M M, all combined substantially as shown, and for the purpose specified. y, f

2. In a stone-laying jack, the combination of the bar E, trcstledegs F F, stay-bars vH H, power-shafts N N, pulley-blocks, and the chains Z Z, provided with the hooks, all substantially as shown and described.

3. A stone-laying jack consisting of the bar E, the legs F F, pivotally attached thereto and adapted to swing therefrom, the stay-bars H H, pivotally connected to the legs andadjnstably secured to the bar, the hoisting-drum, means for operating the same, and the locking-bar D, all combined to operate substany tiall-y as and for the purpose set forth.

JOHN HENRY LIBRE.

Witnesses:

S. W. GoonWIN, L. H. COLBURN. 

